Analog Devices ADP5062 Manual de usuario

Evaluation Board User Guide

UG-500

One Technology Way •P. O. Box 9106 •Norwood, MA 02062-9106, U.S.A. •Tel: 781.329.4700 •Fax: 781.461.3113 •www.analog.com

Evaluating the ADP5062 Linear Li-Ion Battery Charger with Power

Path and USB Compatibility in LFCSP

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 15

ADP5062 FEATURES

Input voltage 4.0 V to 6.7 V

High current terminals for ADP5062 power connection

(VINx), system voltage (ISO_Sx), and battery voltage

(ISO_Bx) pins

ADP5062 operation configurable via I2C interface

Evaluation software included

PACKAGE CONTENTS

ADP5062CP-EVALZ evaluation board

Evaluation CD: ADP5062 evaluation software installer

HARDWARE REQUIREMENTS

USB-to-serial-I/O interface USB-SDP-CABLEZ (The USB-SDP-

CABLEZ is not supplied in the evaluation kit and should be

ordered separately from Analog Devices, Inc.)

SOFTWARE REQUIREMENTS

Analog Devices ADP5062 SDP evaluation software

GENERAL DESCRIPTION

The ADP5062 charger evaluation system is composed of an

evaluation board, an USB A to USB micro B cable and an USB

A adapter board. All evaluation board functions and circuits are

controlled via one I2C bus connector. The I2C bus interfaces

with the ADP5062 directly, and the digital input/output signals

are controlled through an on-board input/output expander

circuit on the I2C bus. The evaluation board also features a 3.4

V regulator for VDDIO generation. The board contains jumpers

and numerous test points for easy evaluation.

The ADP5062CP-EVALZ evaluation kit contains a CD with the

ADP5062 GUI 3v0 installer. Use the GUI in conjunction with

the USB-SDP-CABLEZ, USB to Serial I/O Interface.

Full performance details are provided in the ADP5062 data

sheet, and the ADP5062 data sheet should be consulted in

conjunction with this user guide.

ADP5062 EVALUATION BOARD

ILED

ISO_S_F

VDDIO

ADP5062 QFN20 DEMO

OLANA

D3SD3

Figure 1.

UG-500 Evaluation Board User Guide

Rev. 0 | Page 2 of 15

TABLE OF CONTENTS

ADP5062 Features............................................................................ 1

Package Contents.............................................................................. 1

Hardware Requirements.................................................................. 1

Software Requirements................................................................ 1

General Description ......................................................................... 1

ADP5062 Evaluation Board ............................................................ 1

Revision History ............................................................................... 2

Evaluation Board Software.............................................................. 3

Installing ADP5062 Evaluation Software.................................. 3

Using the Software Graphical User Interface (GUI).................... 4

Operating the Board with the GUI ............................................ 4

Basic Charging Parameter Settings............................................ 4

Setting Interrupts.......................................................................... 5

Setting Timers................................................................................5

Direct Register Read and Write...................................................6

Evaluation Board Overview .............................................................7

Typical Operation..........................................................................7

Input Current.................................................................................7

Trickle Charge Current.................................................................8

Fast Charge Current......................................................................9

Termination Voltage and End of Charge (EOC) Current........9

THR Input and JEITA Settings................................................. 10

Schematic Diagram ........................................................................ 11

Ordering Information.................................................................... 12

Bill of Materials........................................................................... 12

REVISION HISTORY

10/12—Revision 0: Preliminary Version

Evaluation Board User Guide UG-500

Rev. 0 | Page 3 of 15

EVALUATION BOARD SOFTWARE

INSTALLING ADP5062 EVALUATION SOFTWARE

Before installing the ADP5062 evaluation software, the drivers for

the USB-SDP-CABLEZ must be installed. The software and the

instructions can be obtained from www.analog.com/usb-sdp-

cablez.

After proper installation of the USB-SDP-CABLEZ drivers, insert

the ADP5062-EVALZ setup CD and run the Setup.exe file by

following the steps provided in the software installation instruction

document.

UG-500 Evaluation Board User Guide

Rev. 0 | Page 4 of 15

USING THE SOFTWARE GRAPHICAL USER INTERFACE (GUI)

10993-012

4 5

Figure 2. ADP5062 GUI Operation Control and Status Tab

The following are the GUI operation controls and status tools

(see Figure 2):

1. Operation parameter controls

2. Functional enables

3. Interrupt register indicator (Register 0x0A)

4. Charger status

5. Battery status

6. Fault indicators

7. Watchdog control

8. Digital I/O controls

9. I2C Communication Status Indicators

OPERATING THE BOARD WITH THE GUI

Complete the following steps to use the board:

1. Before running the software, ensure that the Analog Devices

USB-SDP-CABLEZ to the USB port of the PC.

2. Connect a 5 V power supply to VIN_F.

3. Click START > All Programs > ADP506x GUI 3Vx SDP>

ADP506x GUI SDP. Once this step is done, the software is

ready to use.

VIN must be above 2.5 V in order for the I2C communication of

the ADP5062 to start working. The VIN voltage level is monitored,

and the indicators are shown in the charger status indicators

(see Number 4 in Figure 2). The GUI automatically reads the

content of the registers after every 0.3 seconds from the last

action and updates the status of the registers on screen.

If there is a problem in the I2C communication, the status

indicators will show an error message (see Number 9 in Figure 2).

When I2C communication is operational, status indicators show

I2C_STATUS_OK (see Figure 2).

BASIC CHARGING PARAMETER SETTINGS

After the input power supply is connected and is between 4.0 V

and 6.7 V, the ADP5062 is operational and capable of charging

the battery. Charging starts with default operational parameter

settings. It is possible to change settings using the controls on

the left side of the Opr Control & Status tab.

Evaluation Board User Guide UG-500

Rev. 0 | Page 5 of 15

SETTING INTERRUPTS

The ADP5062 includes several interrupt flags to inform the

system microcontroller of a status change in the corresponding

charger function. All interrupts are disabled by default, and

each interrupt can be separately enabled by issuing an I2C write

to Register 0x09.

The Interrupts & Timers tab (see Figure 3) in the GUI controls

the register settings. Register 0x0A is automatically read after

every 0.3 second timeout from the last user action involving the

GUI. When a certain interrupt is enabled, and there is a status

change in the corresponding function during charging, an

interrupt message is shown in the Opr Control & Status tab

(see Number 3 in Figure 2).

SETTING TIMERS

The default settings of the timers are shown in Figure 3. Changing

the timer settings can be done by clicking items in the Timer

Settings (Write to Register 0x06) box.

controls the timer settings.

10993-013

Figure 3. ADP5062 Evaluation Software GUI, Interrupts & Timers Tab

UG-500 Evaluation Board User Guide

Rev. 0 | Page 6 of 15

10993-014

Figure 4. ADP5062 Evaluation Software GUI, Register R/W Tab

DIRECT REGISTER READ AND WRITE

It is possible to read and write the content of each register using

the Register R/W tab as indicated in the GUI. Click READ

ALL to update the contents of each register in the GUI. A single

right side of the Register R/W tab of the GUI. Type the I2C sub

address in the Sub Address for READ and WRITE (0x00) box,

and then press ENTER. Click READ to read the binary data, or

click WRITE to write the binary data. Type the binary data for

an I2C write, and then press ENTER. Note that some registers,

such as Register 0x00 and Register 0x01, are read only registers

and cannot be overwritten.

Evaluation Board User Guide UG-500

Rev. 0 | Page 7 of 15

EVALUATION BOARD OVERVIEW

JP1

J11

JP2 JP3

J1 1

72 19

TP4

TP3

TP6

TP5

TP20

C12

J8 J10

J7 J6

R18

R17

R16

R13

R15

R14 R1

R11

R10

THR 5

CBP

SYS_EN

BAT_SNS

VCO_LDO

ISO_B_S

ISO_S_S

D3D1D2

ILED

ISO_S_F

VDDIO

D3 D2 D1

GND BAT_SNSTHR

SYS_EN

GND

ADP5062 QFN20 DEMO

OLANA

VIN_F

GND

ILED

GND

D3SD3

D1S VIN_F

ISO_S_F ISO_B_F GND

GND

SCL

GND

ISO_S_F

ISO_S_S

ISO_B_S

VIN_S GND_S

THR

ILED_S

AGND

BAT_SNS

ISO_B_F

SDA

D2S

VIN_S

SDA

VIN_F

SCL

SMU or

Battery

GND

Battery

Thermistor

System Load

GND

VIN 5.0 V

GND

Figure 5. ADP5062 LFCSP Demo Board Typical Operation Setup.

TYPICAL OPERATION

The typical test setup for the ADP5062 charger consists of a dc

power supply unit (PSU) for VIN_F, a source meter unit (SMU)

or a battery simulator for the ISO_B_x pins, and a variable

power resistor or electronic load for the ISO_S_x pins.

The SMU at the ISO_B node must have a 100 mΩ to 250 mΩ

resistor (RS) in series with its positive lead. The resistor emulates

the equivalent series resistance of a real battery. Some SMU

models that have been successfully used for the ISO_Bx node

include the following:

Keithley 2306 battery simulator

Keithley 2602A SMU

Agilent 6784A/6762A SMU

INPUT CURRENT

Measuring Total Input Current (IVIN)

When measuring VINx input quiescent currents, take into

account that the evaluation board includes an LDO (U1) and

I2C input/output (I/O) expander (U2A, U3A in Figure 7). The

LDO generates a 3.4 V VDDIO voltage for the I2C bus and

SYS_EN open-drain output, and the I/O expander controls

digital inputs DIG_IO1, DIG_IO2, and DIG_IO3.

In the ADP5062 evaluation board typical setup, the U1 and the

U3 are powered through a pin header, J3. Typically, the combined

current consumption of the U1 and the U3 are in the range of

1 mA to 2 mA. To separate the evaluation board quiescent

current from the ADP5062 VINx quiescent current, leave J3

open and connect a second dc power supply (3.5 V to 5.0 V) to

the test-point TP5 (see Figure 6).

UG-500 Evaluation Board User Guide

Rev. 0 | Page 8 of 15

Figure 6. Board Setup for VINx Quiescent Current Measurement

VINx Current Limit

The VINx current limit of the ADP5062 can be evaluated in

charging mode. Note that the maximum programming for the

charge current into the battery (ISO_Bx) is 1300 mA. For

measuring the input current limit across the full programming

range from 100 mA to 2100 mA, additional system load has to

be connected to the ISO_Sx pins.

To measure the VINx current limit, do the following:

1. Set the VVIN supply voltage to 5.0 V.

2. Set the VISO_B voltage to 3.6 V on SMU B

3. Enable charging by setting Register 0x07, bit D0

(EN_CHG), high

4. Confirm the ADP5062 charging mode:

The Battery Status indicator on the GUI must show

BAT_SNS > Vweak (see Figure 2).

The ADP5062 must start charging 80 mA to 90 mA

current into the battery.

5. Measure the current on VINx supply.

6. Use the GUI to change the input current limit programming

and repeat the measurement.

A 1300 mA charge current into the battery may not be large

enough to drive the input current up to the limit when the

current limit programming values of 1200 mA or higher are used.

Connect an additional load on the ISO_Sx node to evaluate the

higher end of the input current limit programming range.

TRICKLE CHARGE CURRENT

Trickle charge can only be activated during a battery charging

startup sequence, if the voltage level at the ISO_Bx pins is lower

than the VTRK_DEAD threshold (typically 2.5 V). When VVIN is 5.0

V, initiate a charge startup sequence by setting an I2C write of

charge current level, do the following:

1. Set the VISO_B voltage (SMU or battery simulator) to 2 V.

2. Set the VIN supply voltage to 5.0 V.

3. Check that the GUI Charger Status indicator shows

Trickle Charge.

4. Check that the GUI Battery Status indicator shows

BAT_SNS < Vtrk.

5. Check the battery short detection by doing the following:

Wait for a 30 second timeout to expire

Check that the GUI shows that the I2C fault register

(Register 0x0D, Bit D3) BAT_SHR flag is set.

Use the GUI to change the battery short timeout

setting from 1 second to 180 second.

6. Measure the trickle charge current level to the battery. The

default value for ITRK_DEAD is 20 mA. It is possible to change

the trickle charge current setting from 5 mA to 80 mA

using the GUI.

7. Adjust the VISO_B voltage up until the Battery Status indicator

shows Vtrk < BAT_SNS < Vweak.

8. The Charger Status indicator on the GUI should show Fast

Charge (CC-Mode). The charge current is now programmed

ICHG + ITRK_DEAD, if it is not limited by the input current limit.

Evaluation Board User Guide UG-500

Rev. 0 | Page 9 of 15

FAST CHARGE CURRENT

To measure the fast change current, do the following:

1. Set the VIN supply voltage to 5.0 V.

2. Set VISO_B to 3.9 V.

3. Verify that the GUI Battery Status indicator shows

BAT_SNS > Vweak.

4. Set the VINx input current limit to the maximum value

2100 mA.

5. Measure the charge current into the battery. The default

value for the fast charge current is 750 mA. It is possible to

change the fast charge current setting from 50 mA to 1300 mA

using the GUI.

6. The fast charge current may be reduced because of the

following conditions:

The VBAT_SNS level is close to the termination voltage

VTRM (default 4.20 V).

The die temperature TJexceeds the isothermal

charging temperature TLIM (typically 115 °C).

TERMINATION VOLTAGE AND END OF CHARGE

(EOC) CURRENT

Measuring Termination Voltage Using SMU or Battery

Simulator

The ADP5062 fast charge constant voltage (CV) regulation is

optimized for batteries with series resistance in the 100 mΩ to

250 mΩ range. When using a SMU or a battery simulator

connected to the ISO_Bx, set the series resistance (RSin Figure 5)

within this range.

Some battery simulators, such as the Keithley 2306, have

programmable source resistance integrated in the instrument

itself. For SMU units, use an external resistor to obtain accurate

measurement results of the termination voltage.

To measure the termination voltage, do the following:

1. Set the VVIN supply voltage to 5.0 V.

2. Set the termination voltage to 4.2 V using the GUI.

3. Disable the EOC by setting the EN_EOC bit (D2) to low in

the functional settings register, Register 0x07.

4. Disable charge complete timer register, Register 0x06, using

the GUI (see Figure 3).

5. Sweep VISO_B up until Charger Status indicator in the GUI

shows Fast Charge (CV-Mode).

6. Sweep VISO_B up until charge current has dropped to 50 mA. In

fast charge CV mode, 1 mV step up of VISO_B can reduce the

charge current by several mA.

7. Measure termination voltage between the BAT_SNS (TP20)

and GND_S (TP9) nodes.

Measuring EOC Current

To measure the EOC current, do the following:

8. Use the GUI to set the termination current to 52.5 mA.

9. Step VISO_B down 100 mV.

10. Enable the EOC by setting the EN_EOC bit (D2) to high in

the functional settings register, Register 0x07.

11. Step VISO_B up and monitor the charge current for each step

until the Charger Status indicator in the GUI shows

Charge Complete. The last charge current value before

Charge Complete is the charge complete current threshold.

Charging stops and there is no current flowing into the

ISO_Bx node.

Measuring Recharge Voltage

To measure the recharge voltage, do the following:

12. Step VISO_B down and monitor the voltage until the

Charger Status indicator on the GUI shows Fast Charge

(CC-Mode) and charge current flows to the ISO_Bx node.

Last value before the charger status change is the recharge

voltage level. With default settings, the recharge voltage

threshold is 3.94 V (VISO_B).

13. Use the GUI to change the termination current and

recharge voltage programming. Repeat Step 9 to Step 12 to

evaluate different settings.

UG-500 Evaluation Board User Guide

Rev. 0 | Page 10 of 15

THR INPUT AND JEITA SETTINGS

The THR input of the ADP5062 evaluation board is equipped

with the 50 kΩ trimmer resistor (R3) and jumper J10. When

using an actual Li-Ion NTC thermistor terminal, configure the

board according to Error! Reference source not found..

1. Remove jumper J10 resistor.

2. Connect the Li-Ion battery NTC thermistor to the screw

terminal, J2, at Pin 4.

Evaluating THR Input Using Typical Board Setup

To evaluate the THR input using the typical board setup, do the

following:

1. Set the VIN supply voltage to 5.0 V.

2. Set VISO_B to 3.9 V.

3. Set the charge current setting to 750 mA using the GUI.

4. Set VIN input current limit to 1500 mA.

5. Enable charging (EN_CHG = high).

6. Measure current to ISO_Bx, value should be 750 mA.

7. Adjust the trimmer resistor until the THR-pin status

indicator on the GUI shows BatCool.

8. Enable JEITA by setting EN_JEITA bit high in functional

settings register, Register 0x08.

9. Measure current to ISO_Bx. Charging current must now

be half of the fast charge current setting.

10. Change the trimmer resistor setting to evaluate the JEITA

thresholds. The THR input resistance thresholds are

specified in the ADP5062 data sheet.

11. The THR-pin status indicator in the GUI must show

BatCold, BatCool, Thermistor OK, BatWarm, or BatHot

when adjusting the trimmer resistance from 50 kΩ to 0 Ω.

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